Tjernlund Products’ Duct Booster Fans are designed for easy installation within heating and cooling ducts to increase the flow of conditioned air to desired areas. The fans operate quietly and are built to offer years of trouble-free service, company officials said. Models of varying capacities are available for installation in metal and flex ductwork. Optional accessories for automatic activation and fan-speed control are also available.

Tjernlund Products Inc.

(800) 255-4208

www.tjernlund.com